Padlock.



I'. I. KIMBALL.

PADLOGK. APPLICATION FILE) AUG.29, 1914. Lmm., Patented Feb. 9, 1915.

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FFTME@ FRANK I. KIMBALL, 0F WEST HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT L COIVLPANY, 0F NEW HAVEN, CONNECTICUT, A. CORPORATION OFCONNECTICUT.

PADLOGK.

Specification of Letters Patent.

Patented Feb. 91, 1915..

Application led August 29, 1914. Serial No. 859,220.

T0 all whom it may concern:

Be it known that I, FRANK l. KIMBALL, a citizen of the United States, residing in West Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Padlocks, of which the following is a full, clear, and eXact description.

This invention relates to padlocks, and more particularly to pin tumbler padlocks. Moreover, it refers especially to pin tumbler padlocks of the 'sliding shackle type, although in some cases a swinging shackle may be employed.

One of the objects of the invention is to provide a pin tumbler padlock wherein the body or case may be constituted by a single piece or block of metal such as produced, for example, by a process of extrusion, and in which the pin tumblers are so located and housed as to prevent very effectively the picking of the padlock by attacking the tumblers from the exterior of the case. Heretofore it has been a common practice to locate the tumblers on-the same side of the caseas the plug or plugs that fill up the drill holes, which construction is open to the disadvantage Jthat access to the tumblers may be readily had if the lplug or plugs arey removed. According to my invention, however, the pin tumblers are located on the opposite side of the case with reference to the cover for the drill holes, with a resulting increase in the security of the padlock.

Another object of the invention is to provide a padlock wherein the tumbler pins or sections adapted to engage sockets in the body of the case may be inserted readily from the bore for the key plug in assembling the padlock, just as in assembling the ordinary cylinder lock, instead of introducing said tumbler pins from the outside of the case, which has been customary heretofore in certain pin tumbler padlocks. This facilitates manufacture and permits the pin tumblers to be located on the opposite side of the case with reference to the drill hole plugs, as above stated.

The invention also contemplates the provision of a padlock wherein a plug which is adapted to fill the opening for the loading tool serves another and very useful function, to wit, that of carrying or mounting the bolt which is actuated by the key plug to engage and disengage the shackle. This simplifies the construction, and also facilitates assembling.

- To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter, described and claimed.

ln the accompanying drawings, Figure 1 is a front elevation of a sliding shackle padlock embodying my improvements, with the shackle closed. Fig. 2 is a vertical longitudinal section of the padlock in the position shown in Fig. 1. Fig. 2A is a section on line 2A-2A of Fig. 2. Fig. 3 is a similar section with the shackle open. Fig. 4 is a longitudinal section through the body or case, with the other parts removed, and Figs. 5 and 6 alie details of the bolt and the bolt carrying ug. The body or case 10 of the padlock may be constituted by a single piece or block of metal, provided with suitable bores or drill holes for the shackle 11, the key plug 12,

and the pin tumblers 13. y, In the form shown the shackle 11 is a sliding shackle having a long end 11a operating in a long bore 14 at one side of the case, and having a short end 11b operating in a short bore 15 at the opposite side of the case. 1n the bore 14 is the fusual spring 16 for protracting or opening the shackle when the same is released by the key mechanism. It will be observed from Fig. 4 that the sockets 17 for those sections of the pin tumblers which engage the body of the case and for` the tumbler springs 18 are located beneath the short shackle bore 15 at the same side of the case. These sockets 17 are formed by drilling holes laterally through the body 10 from the opposite side, that is, from the side having the long shackle bore 14. The drill holes in the outside wall of the case, designated at 19, are at the same side of the case as the long shackle bore 14 and are subsequently covered or filled up by any suitable closure means such as the small plugs 20.

The key plug or barrel 12 is accommof dated in a bore 21, open, as usual, at the bottom of the case, as shown in Fig. 2. Moreover, in accordance with my improvements the bore 21 is open completely through the case to present an opening at the top of the case as well as at the bottom. In the form shown the opening at the upper portion of the case (Fig.v 4) is of a slightly larger diameter than the major portion of the key plug bore 2l, as indicated at 22. In the wall betweentheopening 22 and the bore 15 is an aperture 23, adaptedto be' engaged by abolt 24, actuated by a spring 25 to engage the notch 26 in the free end of the shackle. The bolt 24 is disengaged from the shackle by rotationof the key plug 12, which has an eccentric shoulder or projection 27 adapted tol engage a shoulder 28 on the bolt. This movement' of the bolt byv the key plug is more or less customary, and need not be described in further detail.

'lh-e bolt 24, which may vary considerably inform Without departing from my invention, is locatedin the open portion 22 and is carried by a part adapted to close or lill said open portion 22 at the topv so as to close the padlock body at that point. ln the form illustrated the closure membery for the upper end yolf" the key plug bore, that is, for the extension of said key plug bore, isin the forml of a plu-g 29.r The bolt 24 is carried by plug 29. ln the padlock selected for the illustration the blt 24 is of the sliding type, and is adapted to slide in an opening or bore 30 the plug 291. The bolt 24 is adapted toy be confined within the lines of the plug 29, so that both of them may be as sem-bled'fin the padlock as a unit.` ln doing thisl thefnormally projecting end ofthe bolt,

and?y the spring! 25', are confined within the linesgofV the, plug, and1 the latter isintro duced into-the open portionf-22 fromabove. When thegplug29-is-linally seated in its socket the bolt28 projects through the opening 23 and l isadapted to engage the free end of the shackle. The spring 25 abuts at onev end a part ofthe bolt and at the other end `it re-v acts against awalll separating the bore 22 irom'thebore 14. rlhe plug 29 is held perpadlock theproeedure is substantially as follows: The drill` holes 19 may be filled up at anytime after thepin tumbler'soekets 17 have been formed inthe case;

open portion22, and the tumblersprings 118 andi certain of" the tumbler pins or sections` areinsertedflaterally into thel sockets 17 from theebore21. 'lhe key plug 12 is introducedintothe axial bore in the case from the opposite end, carrying other tumbler The pinr tumblers are inserted in substantially the same manner which is customary in ordinary cylinder locks. A loading tool is pushedv intolthel boreI 2l from the top through the sections, and as the loading tool is moved upward in the bore and out of the top of the bore the key plug is similarly moved upward so as to maintain contact therewith until the tumbler sections carried by the key plug are brought into cooperation with the corresponding tumbler sections of the case. The plug 29, with the bolt 24, is inserted in the opening 22 after the loading tool has been withdrawn, the shackle is placed in position, the pins 34, 35 and 32 are driven through the case to lock the key plug, shackle and bolt plug in place, and the protruding ends of said pins are then polished olif in the usual manner.

The operation of the device will be obvious, for the most part, from the foregoing description. In the locked position, shown in Fig. 2, the spring 25 maintains the locking bolt in locking' engagement with the shackle. /Vhen a key 36 is introduced into the key plug to rack the tumblers the key plug is released, and in turning its projection or shoulder 27 will engage the shoulder 28 on the bolt and withdraw the latter from enga-gement with the shackle, thereby permitting the shackle to be shot outward by its spring 16, as shown inFig; 3. When the shackle is pushed inward again the bolt automatically rengages its notch 2G. 'Vhen the padlock is locked the tumblers cannot be picked by way of the drill holes 19, even if the plugs 20er their equivalent are removed, because the longer arm 1lEL of the shackle effectively blocks said drill holes, and in any case, picking is made very diilicult owing to they fact that the tumbler sockets in the case are at the other side of the key plug. Direct attack on the bolt by means of a wire or other instrument passed through thekey-way is prevented by a plate or blockingI portion 37 located beneath the bolt in line with the key-way. In the forni shown this blocking portion or plate 37 is carried by the keyl plug in such a manner as to lie within the opening 3S in the bottom of the plug 29 and lill up substantially all the space in said opening-3S not occupied by the bolt operating projection 27. Thus, a wire inserted into the key-way will. abut against the plate 37 and will be unable to contact with and withdraw the bolt.

Various modifications in the details of the construction may be adopted within the scope of the invention as defined in the claims.

What l claim is:

1. In a padlock, a case formed of a single block of metal having a key plug bore, tuinbler sockets at one side ot the bore and drill holes at the opposite side of the bore, a key plug in said bore, pin tumblers coperating therewith, a closure for said' drill holes sul stantia-lly within the lines oit the case, and a longitudinally shackle extending into openings of said case 1 Liesbet on opposite sides of the key plug and controlled by the latter; substantially as described.

2. In a padlock, the combination of a case formed of a single block of metal having a key plug bore, tumbler sockets at one side of the bore and drill holes at the opposite side of the bore in line with the tumbler sockets, means substantially Within the lines of the ease to close said drill holes, a shackle engaging openings in the case at opposite sides of the key plug, and a shackle controlling bolt Within the lines of the case operatively connected With the said key plug; substantially as described.

3. ln a padlock, a case formed of a single block of metal, having a central key plug bore, shackle bores parallel to said key plug bore, and on opposite sides thereof, lateral pin tumbler sockets leading from the bore on one side, there being drill holes in .line With said sockets at the opposite side of the case, means for closing said drill holes, a key plug in said lirst named bore, pin tumblers engaging the sockets of the case on the opposite side thereof with reference to said drill holes, a sliding shackle engaging'the shackle bores, and a shackle controlling bolt operatively connected with said key plug; substantially as described.

a. ln a padlock, a case formed of a single block of metal having a central key plug bore extending completely therethrough, shackle bores parallel With said key plug bore, at opposite sides thereof, a sliding shackle engaging said shackle bores, a key plug closing one end oli said key plug bore,

and operatively connected With said shackle, i

pin tumblers cooperating with said key plug, and means for closing the other end of the key plug bore; substantially as described.

5. In a padlock, the combination of a case having a key plug bore extending completely therethrough, a shackle adapted to engage openings in said case at opposite sides of said key plug bore, a key plug closing one end ot'said key plug bore, a bolt for locking the shackle, operatively connected With said key plug, adjacent the other end ol the key plug bore, and means for closing such other end of the key plug bore; substantially as described.

6. ln a padlock, the combination of a case having a key plug bore extending completely therethrough, a shackle adapted to engage openings in said case at opposite sides of said key plug bore, a key plug closing one end of said key plug bore, a bolt for locking the shackle, operatively connected with said key plug, adjacent the other end of the key plug bore, and means for closing such other end of the key plug bore, comprising a plug which serves as a bolt carrier; substantially as described.

member for closing the other end of the key i plug bore and for guiding the bolt; substantially as described.

8. In a padlock, the combination of a case having a key plug bore extending completely therethrough; a shackle attached to .the case, a key plug set in said bore from one end, and a shackle controlling bolt set in said bore from the other end; substantially as described.

9. In a padlock, the combination of a case constituted by a single block of metal, said case having a key plug bore extending completely therethrough, and being provided With pin tumbler sockets on one side of the bore and drill holes on the opposite side of the bore, a key plug closing one end of said key plug bore, pin tuinblers in said sockets, cooperating with said key plug, means for closing said drill holes, a shackle, a shackle controlling bolt operatively connected With said key plug, and means for closing the open end of the key plug bore; substantially as described.

l0. In a padlock, a case having a key plug bore extending completely therethrough, a shackle attached to said case, a key plug set in said key plug bore from one end, a shackle controlling bolt set in said key plug bore from the other end, and means interposed between the key plug and the bolt for preventing the Withdrawal of the latter by a picking tool; substantially as described.

ll. ln a padlock, the combination of a case having two shackle openings at one end and provided with a third opening at the same end of the case intermediate said shackle openings, a shackle adapted to engage said shackle openings, a bolt located in said third opening, means for operating said bolt, and a filler plug for said third opening; substantially as described.

l2; A padlock having an opening extending completely therethrough, a key plug closing said opening at one end, a plug clos ing said opening at the opposite end, a bolt inclosed in the case by said last named plug, and a shackle controlled by said bolt; substantially as described.

13. A padlock having a case With an opening extending completely therethrough, a key plug closing said opening at one end, a member closing said opening at the other end, pin tumbler mechanism cooperating With said key plug, and a shackle controlling bolt guided by said closing member vand ustantially as described.

.operatively connected With the key plug; substantially as described.

14. A padlock having a case With an opening extending completely therethrough, a key plugclosing said opening at one end, pin tumbler mechanism coperating with said keyplug, a member closing said opening at the opposite end, a shackle, and a sliding shackle controlling bolt mounted in and guided by said closing member; sub- 15. In a padlock, the combination of a case having tivo shackle openings at one end and provided with a third opening at the same end of the case intermediate ysaid vshackle openings, a shackle adapted to en.- gage said shackle openings, a bolt located in -said third opening, means for operating said bolt,l and a iiller plug for said third opening, Which serves as a bolt carrier; substantially FRANK I. KIMBALL. Witnesses IVILLIAM A. Rien, E. T. FrrzsIMMoNs.

.Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

